The 'Sector Is Clear' meme originates from a 2017 promotional trailer for the video game Star Wars Battlefront II. In the scene, an Imperial Stormtrooper surveys an area and confidently declares, 'Sector is clear,' only for a massive explosion or an ambush to occur immediately, prompting the panicked cry, 'Not clear! Not clear!' This two-panel format became a viral sensation for its perfect comedic timing, illustrating the bridge between overconfidence and immediate disaster. It is frequently used in gaming circles to mock glitches or unexpected difficulty spikes, but it has also found a home in general internet culture as a relatable way to describe any situation that goes from calm to chaotic in a matter of seconds.